private void btnDisplayCost_Click(object sender, EventArgs e)
{
btnBack.Visible = true;
Carpet selectedCt = new Carpet();
Room selectedRm = new Room();
int carpetNum,
roomNum;
double totalCost;
//Figure out which carpet and room is selected
carpetNum = cmbCarpet.SelectedIndex;
roomNum = cmbRoom.SelectedIndex;
//Find the correct carpet and room in thier respective lists
selectedCt = (Carpet)FrmMain.carpets[carpetNum];
selectedRm = (Room)FrmMain.rooms[roomNum];
totalCost = selectedRm.CalculateArea() * selectedCt.Price;
//Display out in rich textbox
rtbOutput.Text = selectedCt.ToString() + "\n" +
selectedRm.ToString() +
"\nTotal Cost: " + totalCost.ToString("C");
}
